#history {
    width: 800px;
}

#content {
    height: 520px;
}

#rooms {
    display: inline-block;
    width: 230px;
    float: left;
    margin: 0 20px 0 0;
}

#rooms ul, #messages ul {
    list-style: none;
    padding: 0;
    margin: 0 20px 0 0;
}

.room-button {
    margin-bottom: 5px;
    width: 200px !important;
}

#messages {
    display: inline-block;
    float: left;
    width: 550px;
}